CN109155953A - Cell switching method and device - Google Patents
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- CN109155953A CN109155953A CN201680085717.8A CN201680085717A CN109155953A CN 109155953 A CN109155953 A CN 109155953A CN 201680085717 A CN201680085717 A CN 201680085717A CN 109155953 A CN109155953 A CN 109155953A
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- H—ELECTRICITY
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Abstract
The present embodiments relate to cell handoff technique field more particularly to a kind of cell switching methods and device.The cell switching method, comprising: first network equipment determines whether user equipment being switched to Target cell from the serving cell currently connected；When the first network equipment determines, and the user equipment is switched to Target cell from the serving cell currently connected, the first network equipment sends cell switch indicating information to second network equipment, so that second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.The cell switching method and device of the embodiment of the present invention, the problem of service interruption being able to solve in cell switch process.
Description
The present embodiments relate to cell handoff technique field more particularly to a kind of cell switching methods and device.
User equipment is in communication process, and when the position of user equipment occurs mobile, the cell for providing communication service for user equipment may switch, that is, cell switching.
Currently, user equipment realizes the process of cell switching, as shown in Figure 1, specifically including that
A: user equipment sends measurement report to former cell, including measurement result information of multiple cells, such as the receiving intensity of pilot signal etc..
B: former cell when determining progress cell switching, sends switching request message to Target cell according to the measurement report received, wherein includes the contextual information of user equipment in switching request message.
C: Target cell generates cell handover command according to cell switching request message, and sends cell switching request acknowledgement message to former cell, and includes the cell handover command in cell switching request acknowledgement message.
D: former cell forwards the cell handover command to user equipment.
E: user equipment is according to the cell handover command, disconnect the Radio Link with former cell, and the Radio Link of configuration and Target cell, such as down-going synchronous (DL synchronization) information, time advance (Timing advance) information, ascending resource request/confirmation (UL resource request/grant) information of configuration and Target cell.
F: user equipment executes the process of random access Target cell, the new link circuit resource of Target cell application and user face and the control plane information for configuring user equipment, after the completion of Target cell configuration, resume data transmission.
It can be seen that from above-mentioned process, during user equipment is switched to another cell from a cell, since user equipment with former cell disconnecting, to being linked into Target cell, some time is needed, does not have available Radio Link in this period, between user equipment and communication network, it cannot carry out data transmission, cause the service disconnection in handoff procedure.
Summary of the invention
The embodiment of the invention provides a kind of cell switching method and devices, to solve the problem of service interruption in cell switch process.
In a first aspect, the embodiment of the invention provides a kind of cell switching methods, comprising:
First network equipment determines whether user equipment being switched to Target cell from the serving cell currently connected；
When the first network equipment determines, and the user equipment is switched to Target cell from the serving cell currently connected, the first network equipment sends cell switch indicating information to second network equipment, so that second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
In the implementation of the embodiment of the present invention, when determination needs user equipment being switched to Target cell from serving cell (former cell), network side equipment (second network equipment) configures the communication link between user equipment and Target cell according to the link configuration mode between user equipment and former cell, user equipment does not need to execute the reconfiguration course of Radio Link, thus can to avoid in cell switch process because of service disconnection caused by reconfigure Radio Link.
In a kind of possible design, when the first network equipment determines, and the user equipment is switched to Target cell from the serving cell currently connected, the method also includes: the first network equipment to send link configuration information between the user equipment and the serving cell to second network equipment.
In the implementation of the embodiment of the present invention, when determining need to user equipment progress cell switching, link configuration information between user equipment and serving cell is sent to second network equipment by first network equipment, so that second network equipment configures the Radio Link between Target cell and user equipment according to the link configuration information.
In a kind of possible design, the link configuration information is carried in the cell switch indicating information.For example, the cell switch indicating information is cell switching request message, the link configuration information is carried in the cell switching request message.
In a kind of possible design, the link configuration information includes one or more of: the user equipment receives the search space information of common signal channel in the serving cell；The running time-frequency resource information that the user equipment is configured in the serving cell；The reference signal sequence that the user equipment is used in the serving cell sending and receiving data, the scrambler sequence that the user equipment is used in the serving cell sending and receiving data；For calculating the user equipment in the parameter of the serving cell link configuration, wherein, user equipment may include the above-mentioned user equipment running time-frequency resource configured in the serving cell, the reference signal sequence that uses in serving cell sending and receiving data and the scrambler sequence used in serving cell sending and receiving data etc. in the link configuration of the serving cell, specifically, the parameter can be cell ID and customer equipment identification etc..
In the implementation of the embodiment of the present invention, after second network equipment receives the link configuration information of first network equipment transmission, the running time-frequency resource that second network equipment determines search space of the user equipment under current service cell according to described search spatial information and the running time-frequency resource information and uses, in order to which second network equipment carries out link configuration according to search space of the user equipment under current service cell and the running time-frequency resource used, in addition, second network equipment is that the reference signal that the correlated channels of user equipment distribution are used when sending and receiving data is the reference signal sequence that user equipment currently uses (i.e. in serving cell sending and receiving data), the scrambling code used is the currently used scrambler sequence of user equipment, it does not need second network equipment and distributes new reference signal sequence and scrambler sequence, thus to realize user Equipment is communicated under the premise of not changing radio link configuration by Target cell.
In a kind of possible design, the first network equipment determines whether for user equipment to be switched to before Target cell from the serving cell currently connected, the method also includes: signal quality of the user equipment under the serving cell described in the first network device measuring obtains signal quality information of the user equipment under the serving cell；The first network equipment receives signal quality information of the user equipment of second network equipment transmission under at least one cell in addition to the serving cell.
In a kind of possible scene, such as when user equipment progress signal blocks region, signal quality sharply declines, and user equipment possibly can not send measurement report to first network equipment, first network equipment also can not send user equipment for switching command, lead to the call drop of user equipment.In order to solve the technical problem, first network equipment changes the mode obtained for deciding whether to carry out user equipment cell handover information in the embodiment of the present invention, specifically, signal quality of the first network device measuring user equipment under current service cell, second network equipment measures signal quality signal of the user equipment under at least one cell in addition to serving cell, thus signal quality information of the available user equipment of first network equipment under multiple cells, when determining switching instruction directly can be sent to corresponding network side equipment when needing to carry out cell switching, without carrying out information exchange with user equipment, thus it also can solve user equipment due to Special Handle of Drop Question caused by can not sending measurement report to network side equipment.
Second aspect, the embodiment of the invention provides a kind of cell switching methods, it include: that second network equipment receives the cell switch indicating information that first network equipment is sent, the cell switch indicating information is used to indicate second network equipment and user equipment is switched to Target cell from the serving cell currently connected；Second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
In implementation of the embodiment of the present invention, after second network equipment receives the cell switching instruction of first network equipment transmission, second network equipment configures the communication link between user equipment and Target cell according to the link configuration mode between user equipment and former cell, network side equipment do not need to apply again new air-link resources and executes reconfiguring for Radio Link, thus can to avoid in cell switch process because caused by reconfiguring Radio Link in business
It is disconnected.
In a kind of possible design, the method also includes: second network equipment receives the link configuration information between the user equipment and the serving cell that the first network equipment is sent.
In a kind of possible design, the link configuration information is carried in the cell switch indicating information.
In a kind of possible design, the link configuration information includes one or more of:
The user equipment receives the search space information of common signal channel in the serving cell；
The running time-frequency resource information that the user equipment is configured in the serving cell；
The reference signal sequence that the user equipment is used in the serving cell sending and receiving data
The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；
For calculating the user equipment in the parameter of the serving cell link configuration.
In a kind of possible design, before second network equipment receives the cell switch indicating information that first network equipment is sent, the method also includes:
Second network equipment measures signal quality of the user equipment under the Target cell, obtains signal quality information of the user equipment under the Target cell；
Signal quality information of the user equipment under the Target cell is sent to the first network equipment by second network equipment.
The third aspect, the embodiment of the invention provides a kind of cell switching device, which has the function of realizing first network equipment behavior in cell switching method embodiment.The function can also execute corresponding software realization by hardware realization by hardware.The hardware or software include one or more modules corresponding with above-mentioned function.
In a kind of possible design, the cell switching device comprises determining that unit and transmission unit, and the determination unit is used to determine whether user equipment being switched to Target cell from the serving cell currently connected；Transmission unit, for when the processing unit determines the user equipment being switched to Target cell from the serving cell currently connected, cell switch indicating information is sent to second network equipment, so that second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
In a kind of possible design, when the determination unit determines that the user equipment is switched to Target cell from the serving cell currently connected, the transmission unit is also used to:
The link configuration information between the user equipment and the serving cell is sent to second network equipment.
In a kind of possible design, the link configuration information is carried in the cell switch indicating information.In a kind of possible design, the link configuration information includes one or more of:
The user equipment receives the search space information of common signal channel in the serving cell；
The running time-frequency resource information that the user equipment is configured in the serving cell；
The reference signal sequence that the user equipment is used in the serving cell sending and receiving data；
The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；
For calculating the user equipment in the parameter of the serving cell link configuration.
In a kind of possible design, described device further include: measuring unit and receiving unit；
Before the determination unit determines whether user equipment being switched to Target cell from the serving cell currently connected:
The measuring unit obtains signal quality information of the user equipment under the serving cell for measuring signal quality of the user equipment under the serving cell；
The receiving unit, for receiving signal quality information of the user equipment of second network equipment transmission under at least one cell in addition to the serving cell.
In alternatively possible design, the cell switching device includes: transmitter, receiver and processor；The processor is used to determine whether user equipment being switched to Target cell from the serving cell currently connected；The transmitter is used for when the processor determines the user equipment being switched to Target cell from the serving cell currently connected, cell switch indicating information is sent to second network equipment, so that second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
Further, the transmitter is also used to execute the correlation step that transmission unit executes in third aspect embodiment；The receiver is used to execute the correlation step that receiving unit executes in third aspect embodiment；The processor is also used to execute the correlation step that determination unit and measuring unit execute in third aspect embodiment.
Fourth aspect, the embodiment of the invention provides a kind of cell switching device, which has the function of realizing the second network equipment behavior in cell switching method embodiment.The function can also execute corresponding software realization by hardware realization by hardware.The hardware or software include one or more modules corresponding with above-mentioned function.
In a kind of possible design, the cell switching device includes: receiving unit and link configuration unit, wherein, receiving unit, for receiving the cell switch indicating information of first network equipment transmission, the cell switch indicating information is used to indicate second network equipment and user equipment is switched to Target cell from the serving cell currently connected；Link configuration unit, for being configured according to the link configuration information between the user equipment and the serving cell to the communication link between the user equipment and the Target cell.
In a kind of possible design, the receiving unit is also used to receive the link configuration information between the user equipment and the serving cell that the first network equipment is sent.
In a kind of possible design, the link configuration information is carried in the cell switch indicating information.
In a kind of possible design, the link configuration information includes one or more of:
The user equipment receives the search space information of common signal channel in the serving cell；
The running time-frequency resource information that the user equipment is configured in the serving cell；
The reference signal sequence that the user equipment is used in the serving cell sending and receiving data
The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；
For calculating the user equipment in the parameter of the serving cell link configuration.
In a kind of possible design, described device further includes measuring unit and transmission unit；
Before the cell switch indicating information that the receiving unit receives that first network equipment is sent:
The measuring unit obtains signal quality information of the user equipment under the Target cell for measuring signal quality of the user equipment under the Target cell；
The transmission unit, for signal quality information of the user equipment under the Target cell to be sent to the first network equipment.
In alternatively possible design, the cell switching device includes: transmitter, receiver and processor；The receiver, for receiving the cell switch indicating information of first network equipment transmission, the cell switch indicating information is used to indicate second network equipment and user equipment is switched to Target cell from the serving cell currently connected；The processor is for configuring the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
Further, the receiver is also used to execute the correlation step that receiving unit executes in fourth aspect embodiment；The transmitter is used to execute the correlation step that transmission unit executes in fourth aspect embodiment；The processor is also used to execute the correlation step that link configuration unit and measuring unit execute in fourth aspect embodiment.
5th aspect, the embodiment of the invention provides a kind of computer storage mediums, and for being stored as computer software instructions used in above-mentioned first network equipment, it includes for executing program designed by above-mentioned cell switching method.
6th aspect, the embodiment of the invention provides a kind of computer storage mediums, and for being stored as computer software instructions used in above-mentioned second network equipment, it includes for executing program designed by above-mentioned cell switching method.
Cell switching method and device provided in an embodiment of the present invention, the problem of service interruption being able to solve in cell switch process.
Fig. 1 is the flow chart of cell switching method in the prior art；
Fig. 2 is a kind of possible application scenarios schematic diagram of the embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of a scenario of cell switching based on Fig. 2 system architecture；
Fig. 4 is the flow chart of one cell switching method of the embodiment of the present invention.
Fig. 5 is another schematic diagram of a scenario of cell switching；
Fig. 6 is the flow chart of two cell switching method of the embodiment of the present invention.
Fig. 7 is the structural schematic diagram of one cell switching device of the embodiment of the present invention；
Fig. 8 is the structural schematic diagram of two cell switching device of the embodiment of the present invention；
Fig. 9 is the structural schematic diagram of three cell switching device of the embodiment of the present invention.
Fig. 2 is a kind of possible application scenarios schematic diagram of the embodiment of the present invention.As shown in Fig. 2, user equipment (UE) passes through wireless access network (Radio Access Network, referred to as) and core net (Core Network, abbreviation CN) access business network.The technology that the present invention describes can be adapted for beehive network system, long term evolution (Long Term Evolution, abbreviation LTE) system, or other use the wireless communication system of various wireless access technologys, for example, by using CDMA, frequency division multiple access, time division multiple acess, orthogonal frequency division multiple access, the system of the access technologies such as single-carrier frequency division multiple access.Further, it is also possible to be suitable for using the subsequent evolution system of LTE system, such as the 5th generation 5G system.
In embodiments of the present invention, involved user equipment may include the various handheld devices with wireless communication function, mobile unit, wearable device, calculate equipment or be connected to other processing equipments of radio modem, and various forms of user equipment (User Equipment, abbreviation UE), mobile station (Mobile station, abbreviation MS), terminal (terminal), terminal device (Terminal Equipment) etc..For convenience of description, in the application, apparatus mentioned above is referred to as user equipment or UE.The base station (base station, abbreviation BS) involved in the present invention arrived is a kind of is deployed in wireless access network to provide the device of wireless communication function for UE.The base station may include various forms of macro base stations, micro-base station, relay station, access point etc..In the system using different wireless access technologys, the title for having the equipment of base station functions may be different, such as in the lte networks, the referred to as node B (evolved NodeB abbreviation: eNB or eNodeB) of evolution, in third generation 3G network, referred to as node B (Node B) etc..For convenience of description, in the application, the above-mentioned device for providing wireless communication function for UE is referred to as base station or BS.
Fig. 3 is a kind of schematic diagram of a scenario of cell switching of the system architecture based on Fig. 2.As shown in figure 3, UE is connect by base station with core network.Wherein, during UE is mobile, another cell for being switched to from a cell.In order to solve problem of service interruption brought by cell switching method in the prior art, the embodiment of the invention provides
A kind of cell switching method.Wherein, in the cell switching method of the embodiment of the present invention, when first network equipment determines, and UE is switched to Target cell from the serving cell currently connected, first network equipment sends cell indication message to second network equipment, second network equipment receives after the cell indication message of first network equipment transmission, second network equipment is according to the link configuration information configuration UE between UE and former cell (i.e. above-mentioned serving cell) and the communication link between Target cell, UE does not need to execute the reconfiguration course of Radio Link, therefore can to avoid in cell switch process because of problem of service interruption caused by reconfigure Radio Link.
In one possible implementation, above-mentioned first network equipment and second network equipment are respectively deployed in two autonomous devices, and if first network deployed with devices is in first base station, optionally, the signal coverage areas of first base station includes above-mentioned serving cell；Second network equipment is in the second base station, and optionally, the signal coverage areas of the second base station includes above-mentioned Target cell.
In alternatively possible implementation, above-mentioned first network equipment and the second network equipment are in the same equipment, if first network equipment and the second network equipment are in the same base station, the signal coverage areas of the base station includes above-mentioned serving cell and Target cell, optionally, first network equipment and second network equipment can be two virtual machines on base station, and first network equipment is responsible for the communication service in serving cell, the communication service of the second network device services Target cell.
It is described in detail below with reference to cell switching method of the specific embodiment to the application.
Fig. 4 is the flow chart of one cell switching method of the embodiment of the present invention.The processing step of cell switching method shown in Fig. 4 includes:
Step S101:UE sends measurement report to first network equipment corresponding with serving cell, wherein includes the measurement result information of multiple cells in measurement report includes, such as includes receiving intensity of the UE to each cell pilots in measurement report.
Step S102: first network equipment determines the need for carrying out cell switching to UE according to the measurement report received.
Measurement result information of the first network equipment according to cell each in measurement report, the signal strength of more each cell be can choose and carry out cell switching to UE when UE is when the signal strength of some cell is greater than signal strength in serving cell.
Step S103: when UE is switched to Target cell by the determination of first network equipment, first network equipment sends cell switch indicating information to second network equipment corresponding with Target cell.
Optionally, the cell switch indicating information is switching request message.
Optionally, first network equipment also sends the link configuration information between UE and serving cell when sending cell switch indicating information to second network equipment.
In one possible implementation, the link configuration information carries in the cell switch indicating information.
In a specific example, the link configuration information is carried in cell switching request message.
S104: the second network equipment of step receives the cell switch indicating information that first network equipment is sent.
Optionally, the cell switch indicating information that second network equipment receives is cell switching request message.
Optionally, second network equipment also receives the link configuration information between the UE and serving cell of the transmission of first network equipment.
In one possible implementation, the link configuration information carries in the cell switch indicating information.
In a specific example, the link configuration information is carried in cell switching request message.
S105: the second network equipment of step configures the communication link between UE and Target cell according to the link configuration information between UE and serving cell.
Optionally, second network equipment configures the communication link between UE and Target cell according to the link configuration information between the UE and serving cell received.
Wherein, the link configuration information between UE and serving cell includes below one or more, it may for example comprise the one of which in following information, alternatively, including the combination of two or more any information:
UE receives the search space information of common signal channel in serving cell；
The running time-frequency resource information that UE is configured in serving cell；
The reference signal sequence that UE is used in serving cell sending and receiving data；
The scrambler sequence that UE is used in serving cell sending and receiving data；
For calculating UE in the parameter of serving cell link configuration, wherein, UE may include one of the UE running time-frequency resource configured in serving cell, the reference signal sequence that uses in serving cell sending and receiving data and the scrambler sequence used in serving cell sending and receiving data etc. or a variety of in the link configuration of serving cell, specifically, the parameter can be cell ID and UE mark etc..
For above-mentioned link configuration parameters, the running time-frequency resource that second network equipment can determine search space of the UE under current service cell and be used according to described search spatial information and the running time-frequency resource information, in order to which second network equipment carries out link configuration according to search space of the UE under current service cell and the running time-frequency resource used, separately
Outside, second network equipment is that the reference signal that the correlated channels of UE distribution are used when sending and receiving data is the reference signal sequence that UE is currently used (i.e. in serving cell sending and receiving data), the scrambling code used is the currently used scrambler sequence of UE, it does not need second network equipment and distributes new reference signal sequence and scrambler sequence, thus to realize that UE under the premise of not changing radio link configuration, is communicated by Target cell.In addition, when including for calculating UE in the parameter of serving cell link configuration in the link configuration information, second network equipment can calculate UE in the specific link configuration information of serving cell according to the parameter, the search space that UE receives common signal channel in serving cell is such as calculated, in the running time-frequency resource of serving cell configuration, the reference signal data that use of sending and receiving data and scrambler sequence etc..
In the embodiment of the present invention, when carrying out cell switching, second network equipment configures the communication link that you is liked between UE and Target cell according to the link configuration mode between UE and former cell, UE no longer needs to execute the reconfiguration course of Radio Link, thus can to avoid in cell switch process because of service disconnection caused by reconfigure Radio Link.
Fig. 5 is another schematic diagram of a scenario of cell switching.As shown in Figure 5, cell 1 is the serving cell of UE, cell 2 is the adjacent area of cell 1, UE is mobile from cell 1 to cell 2, during UE is mobile, due to the blocking by building, channel between UE and cell 1 can decrease notably, cause UE that can not communicate with cell 1, the measurement report and RRC reconfiguration message that must be sent in cell switch process may send failure, eventually lead to UE call drop.In order to solve the Special Handle of Drop Question caused by decreasing notably due to channel in cell switch process, the embodiment of the invention also provides a kind of specific methods of cell switching.
Fig. 6 is the flow chart of two cell switching method of the embodiment of the present invention.The processing step of cell switching method shown in Fig. 6 includes:
Step S201:UE accesses first community, and first community becomes the serving cell of UE.
Step S202: the first network device measuring UE signal quality under serving cell, obtains signal quality information of the UE under serving cell.
For example, SRS (Sounding Reference Signal, the detection reference signal) power of first network device measuring UE under first community.
S203: the second network equipment of step measures signal quality of the UE under at least one cell in addition to first community, obtains signal quality information of the UE under at least one cell in addition to first community.
Such as second SRS power of the network equipment measurement UE under at least one cell in addition to first community, in a specific example, second network equipment measures UE in the SRS power of second community.
Signal quality information of the UE under at least one cell in addition to first community is sent to first network equipment by S204: the second network equipment of step.
Step S205: first network equipment is according to UE in the signal quality information of signal quality information and UE under at least one cell in addition to first community under first community, it is determined whether carries out cell switching.
For example, signal quality information of the UE under second community is sent to first network equipment by second network equipment, when signal quality of the UE under second community is better than signal quality of the UE under first community, first network equipment, which determines, carries out cell switching.For example, UE, when the SRS power under second community is greater than SRS power of the UE under first community, first network equipment, which is determined, is switched to second community from first community for UE.
Step S206: first network equipment sends cell switch indicating information to second network equipment.
After S207: the second network equipment of step receives cell switch indicating information, the communication link between UE and Target cell is configured according to the link configuration information between UE and serving cell.
Optionally, the cell switch indicating information that second network equipment receives is cell switching request message.
Optionally, second network equipment also receives the link configuration information between the UE and serving cell of the transmission of first network equipment.
In one possible implementation, the link configuration information carries in the cell switch indicating information.
In a specific example, the link configuration information is carried in cell switching request message.
Optionally, second network equipment configures the communication link between UE and Target cell according to the link configuration information in cell switching request message.
Wherein, the link configuration information between UE and serving cell includes below one or more, it may for example comprise the one of which in following information, alternatively, including the combination of two or more any information:
UE receives the search space information of common signal channel in serving cell；
The running time-frequency resource information that UE is configured in serving cell；
The reference signal sequence that UE is used in serving cell sending and receiving data；
The scrambler sequence that UE is used in serving cell sending and receiving data；
For calculating UE in the parameter of serving cell link configuration, wherein, UE may include one of the UE running time-frequency resource configured in serving cell, the reference signal sequence that uses in serving cell sending and receiving data and the scrambler sequence used in serving cell sending and receiving data etc. or a variety of in the link configuration of serving cell, specifically, the parameter can be cell ID and UE mark etc..
For above-mentioned link configuration parameters, the running time-frequency resource that second network equipment can determine search space of the UE under current service cell and be used according to described search spatial information and the running time-frequency resource information, in order to second
The network equipment carries out link configuration according to search space of the UE under current service cell and the running time-frequency resource used, in addition, second network equipment is that the reference signal that the correlated channels of UE distribution are used when sending and receiving data is the reference signal sequence that UE is currently used (i.e. in serving cell sending and receiving data), the scrambling code used is the currently used scrambler sequence of UE, it does not need second network equipment and distributes new reference signal sequence and scrambler sequence, thus to realize that UE under the premise of not changing radio link configuration, is communicated by Target cell.In addition, when including for calculating UE in the parameter of serving cell link configuration in the link configuration information, second network equipment can calculate UE in the specific link configuration information of serving cell according to the parameter, the search space that UE receives common signal channel in serving cell is such as calculated, in the running time-frequency resource of serving cell configuration, the reference signal data that use of sending and receiving data and scrambler sequence etc..
In a specific example, the link configuration information that first network equipment is sent between the UE and serving cell of second network equipment includes: the enhancing Physical Downlink Control Channel (English: Enhanced Physical Downlink Control Channel that UE is used in serving cell, referred to as: ePDCCH) resource, Physical Downlink Shared Channel (English: Physical Downlink Shared Channel, referred to as: PDSCH) resource and Physical Uplink Shared Channel (English: Physical Uplink Shared Channel, referred to as: PUSCH), wherein, ePDCCH resource includes for transmitting control information Running time-frequency resource and scrambling code, PDSCH resource includes the running time-frequency resource and scrambling code for being used for transmission downlink data, and PUSCH includes the running time-frequency resource and scrambling code for being used for transmission upstream data.
Second network equipment is according to the communication link between the link configuration information configuration Target cell received and UE, specifically, the ePDCCH resource that Target cell sends Downlink Control Information is that UE being capable of received search space under the used channel configuration of serving cell, further, demodulated reference signal (the English: Demodulation Reference Signal that Target cell is sent in ePDCCH and PDSCH, referred to as: DMRS) using UE in serving cell sequence currently in use, UE can be made in the case where not changing present channel configuration in this way, still the data sent from Target cell be can receive.PUSCH resource and the UE PUCCH resource currently in use that Target cell is configured according to UE in serving cell receive the upstream data that UE is sent, and the DMRS sequence of the up channel configuration used originally using UE is demodulated.
In the cell switch process of the embodiment of the present invention, since former cell (i.e. serving cell) and Target cell all maintain channel configuration that can simultaneously with UE communication, UE and two cell may be implemented and send and receive data simultaneously.
In the cell switch process of the embodiment of the present invention, Signalling exchange is carried out without the channel by deteriorating suddenly between former cell and UE, therefore is not in due to Special Handle of Drop Question caused by Signalling exchange failure.In addition, eliminate UE in cell switch process and disconnect the process for connecting and re-searching for the channel configuration of access Target cell with former cell,
It therefore can be to avoid the interruption of thus caused long-time data transport service.
Corresponding above-mentioned cell switching method, the embodiment of the invention also provides cell switching devices.Fig. 7 is the structural schematic diagram of one cell switching device of the embodiment of the present invention.Device shown in Fig. 7 can be used for executing the cell switch step that first network equipment is performed in embodiment one and implementation two in above-mentioned each method embodiment, the major function of cell switching device is introduced below with reference to the specific structure of cell switching device, being not directed to part may refer to embodiment one and embodiment two.
As shown in fig. 7, cell switching device comprises determining that unit 301 and transmission unit 302, in which:
Determination unit 301 is used to determine whether user equipment being switched to Target cell from the serving cell currently connected；
Transmission unit 302, for when the processing unit determines the user equipment being switched to Target cell from the serving cell currently connected, cell switch indicating information is sent to second network equipment, so that second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
In a kind of possible design, when the determination unit 301 determines that the user equipment is switched to Target cell from the serving cell currently connected, the transmission unit 302 is also used to: second network equipment of Xiang Suoshu sends the link configuration information between the user equipment and the serving cell.
In a kind of possible design, the link configuration information is carried in the cell switch indicating information.
In a kind of possible design, the link configuration information includes one or more of:
The user equipment receives the search space information of common signal channel in the serving cell；
The running time-frequency resource information that the user equipment is configured in the serving cell；
The reference signal sequence that the user equipment is used in the serving cell sending and receiving data；
The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；
For calculating the user equipment in the parameter of the serving cell link configuration.
In a kind of possible design, described device further include: measuring unit 303 and receiving unit 304；
Before the determination unit 301 determines whether user equipment being switched to Target cell from the serving cell currently connected:
The measuring unit 303 obtains signal quality information of the user equipment under the serving cell for measuring signal quality of the user equipment under the serving cell；
The receiving unit 304, for receiving signal quality information of the user equipment of second network equipment transmission under at least one cell in addition to the serving cell.
Fig. 8 is the structural schematic diagram of two cell switching device of the embodiment of the present invention.Device shown in Fig. 8 can be used for executing the cell switch step that second network equipment is performed in embodiment one and implementation two in above-mentioned each method embodiment,
The major function of cell switching device is introduced below with reference to the specific structure of cell switching device, being not directed to part may refer to embodiment one and embodiment two.
As shown in figure 8, cell switching device, comprising: receiving unit 401 and link configuration unit 402, in which:
Receiving unit 401, for receiving the cell switch indicating information of first network equipment transmission, the cell switch indicating information is used to indicate second network equipment and user equipment is switched to Target cell from the serving cell currently connected；
Link configuration unit 402, for being configured according to the link configuration information between the user equipment and the serving cell to the communication link between the user equipment and the Target cell.
In a kind of possible design, the receiving unit 401 is also used to receive the link configuration information between the user equipment and the serving cell that the first network equipment is sent.
In a kind of possible design, the link configuration information is carried in the cell switch indicating information.
In a kind of possible design, the link configuration information includes one or more of:
The user equipment receives the search space information of common signal channel in the serving cell；
The running time-frequency resource information that the user equipment is configured in the serving cell；
The reference signal sequence that the user equipment is used in the serving cell sending and receiving data；
The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；
For calculating the user equipment in the parameter of the serving cell link configuration.
In a kind of possible design, described device further includes measuring unit 403 and transmission unit 404；
Before the cell switch indicating information that the receiving unit 401 receives that first network equipment is sent:
The measuring unit 403 obtains signal quality information of the user equipment under the Target cell for measuring signal quality of the user equipment under the Target cell；
The transmission unit 404, for signal quality information of the user equipment under the Target cell to be sent to the first network equipment.
Above-mentioned Fig. 7 and cell switching device shown in Fig. 8 are functionally divided, in actual application scenarios, it can also be provided from actual hardware angle and the structure of cell switching device is divided, wherein, when being divided from function of the hardware point of view to cell switching device, Fig. 7 and the hardware configuration of cell switching device shown in Fig. 8 can be identical, in alternatively possible design, Fig. 7 and cell switching device shown in Fig. 8 are deployed in the same device, based on this, it is following to be illustrated with a kind of hardware configuration of specific equipment to Fig. 7 and cell switching device shown in Fig. 8.
Fig. 9 is the structural schematic diagram of three cell switching device of the embodiment of the present invention.Cell switching device shown in Fig. 9 includes emitter/receiver 501, controller/processor 502, memory 503 and communication unit 504.The transmitting
Device/receiver 501 is used to support to receive and send messages between UE and the other cell switching devices in cell switching device and above-described embodiment, and supports to carry out radio communication between the UE and other UE.
When cell switching device shown in Fig. 9 is used for the hardware realization structure as cell switching device shown in Fig. 7, emitter/receiver 501 for realizing transmission unit 302 and receiving unit 304 in Fig. 7 function, controller/processor 502 for realizing determination unit 301 and measuring unit 303 in Fig. 7 function.Memory 503, for storing program.Specifically, program may include program code, and program code includes computer operation instruction.Memory 503 may include random access memory (random access memory, abbreviation RAM), it is also possible to further include nonvolatile memory (non-volatile memory), for example, at least a magnetic disk storage.Controller/processor 502 realizes the function performed by first network equipment in embodiment one and embodiment two by executing the program stored in memory 503.
When cell switching device shown in Fig. 9 is used for the hardware realization structure as cell switching device shown in Fig. 8, emitter/receiver 501 for realizing receiving unit 401 and transmission unit 404 in Fig. 8 function, controller/processor 502 for realizing link configuration unit 402 and measuring unit 403 in Fig. 8 function.Memory 503, for storing program.Specifically, program may include program code, and program code includes computer operation instruction.Memory 503 may include random access memory (random access memory, abbreviation RAM), it is also possible to further include nonvolatile memory (non-volatile memory), for example, at least a magnetic disk storage.Controller/processor 502 realizes the function performed by second network equipment in embodiment one and embodiment two by executing the program stored in memory 503.
Further, cell switching device shown in Fig. 9 can also realize the function to be realized of Fig. 7 and Fig. 8 shown device simultaneously.
It is designed it is understood that Fig. 5 illustrate only simplifying for cell switching device.In practical applications, cell switching device may include any number of transmitter, receiver, processor, controller, memory, communication unit etc., and all cell switching device of the invention may be implemented all within protection scope of the present invention.
Controller/processor for executing the above-mentioned cell switching device function of the present invention can be central processing unit (CPU), general processor, digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) perhaps other programmable logic device, transistor logic hardware component or any combination thereof.It, which may be implemented or executes, combines various illustrative logic blocks, module and circuit described in the disclosure of invention.The processor is also possible to realize the combination of computing function, such as combines comprising one or more microprocessors, DSP and the combination of microprocessor etc..
The step of method in conjunction with described in the disclosure of invention or algorithm, can be realized in a manner of hardware, be also possible to execute the mode of software instruction by processor to realize.Software instruction can be made of corresponding software module, soft
Part module can be stored in the storage medium of RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, register, hard disk, mobile hard disk, CD-ROM or any other form well known in the art.A kind of illustrative storage medium is coupled to processor, to enable a processor to from the read information, and information can be written to the storage medium.Certainly, storage medium is also possible to the component part of processor.Pocessor and storage media can be located in ASIC.In addition, the ASIC can be located in user equipment.Certainly, pocessor and storage media can also be used as discrete assembly and be present in user equipment.
It will be appreciated that in said one or multiple examples, function described in the invention can be realized those skilled in the art with hardware, software, firmware or their any combination.When implemented in software, these functions can be stored in computer-readable medium or as on computer-readable medium one or more instructions or code transmit.Computer-readable medium includes computer storage media and communication media, and wherein communication media includes convenient for from a place to any medium of another place transmission computer program.Storage medium can be any usable medium that general or specialized computer can access.
Above-described specific embodiment; the purpose of the present invention, technical scheme and beneficial effects are had been further described; it should be understood that; the foregoing is merely a specific embodiment of the invention; it is not intended to limit the scope of protection of the present invention; all any modification, equivalent substitution, improvement and etc. on the basis of technical solution of the present invention, done should all include within protection scope of the present invention.
Claims (20)
- A kind of cell switching method characterized by comprisingFirst network equipment determines whether user equipment being switched to Target cell from the serving cell currently connected；When the first network equipment determines, and the user equipment is switched to Target cell from the serving cell currently connected, the first network equipment sends cell switch indicating information to second network equipment, so that second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
- The method according to claim 1, wherein when the first network equipment determines the user equipment being switched to Target cell from the serving cell currently connected, the method also includes:The first network equipment sends the link configuration information between the user equipment and the serving cell to second network equipment.
- According to the method described in claim 2, it is characterized in that, the link configuration information carries in the cell switch indicating information.
- According to the method in claim 2 or 3, which is characterized in that the link configuration information includes one or more of:The user equipment receives the search space information of common signal channel in the serving cell；The running time-frequency resource information that the user equipment is configured in the serving cell；The reference signal sequence that the user equipment is used in the serving cell sending and receiving data；The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；For calculating the user equipment in the parameter of the serving cell link configuration.
- Method according to claim 1 to 4, which is characterized in that before the first network equipment determines whether user equipment being switched to Target cell from the serving cell currently connected, the method also includes:Signal quality of the user equipment under the serving cell described in the first network device measuring, obtains signal quality information of the user equipment under the serving cell；The first network equipment receives signal quality information of the user equipment of second network equipment transmission under at least one cell in addition to the serving cell.
- A kind of cell switching method characterized by comprisingSecond network equipment receives the cell switch indicating information that first network equipment is sent, and the cell switch indicating information is used to indicate second network equipment and user equipment is switched to Target cell from the serving cell currently connected；Second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
- According to the method described in claim 6, it is characterized in that, the method also includes:Second network equipment receives the link configuration information between the user equipment and the serving cell that the first network equipment is sent.
- The method according to the description of claim 7 is characterized in that the link configuration information carries in the cell switch indicating information.
- Method according to claim 7 or 8, which is characterized in that the link configuration information includes one or more of:The user equipment receives the search space information of common signal channel in the serving cell；The running time-frequency resource information that the user equipment is configured in the serving cell；The reference signal sequence that the user equipment is used in the serving cell sending and receiving data；The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；For calculating the user equipment in the parameter of the serving cell link configuration.
- Method according to any one of claims 6 to 9, which is characterized in that before second network equipment receives the cell switch indicating information that first network equipment is sent, the method also includes:Second network equipment measures signal quality of the user equipment under the Target cell, obtains signal quality information of the user equipment under the Target cell；Signal quality information of the user equipment under the Target cell is sent to the first network equipment by second network equipment.
- A kind of cell switching device, which is characterized in that described device is deployed in first network equipment, comprising:Determination unit is used to determine whether user equipment being switched to Target cell from the serving cell currently connected；Transmission unit, for when the processing unit determines the user equipment being switched to Target cell from the serving cell currently connected, cell switch indicating information is sent to second network equipment, so that second network equipment configures the communication link between the user equipment and the Target cell according to the link configuration information between the user equipment and the serving cell.
- Device according to claim 11, which is characterized in that when the determination unit determines that the user equipment is switched to Target cell from the serving cell currently connected, the transmission unit is also used to:The link configuration information between the user equipment and the serving cell is sent to second network equipment.
- Device according to claim 12, which is characterized in that the link configuration information carries In the cell switch indicating information.
- Device according to claim 12 or 13, which is characterized in that the link configuration information includes one or more of:The user equipment receives the search space information of common signal channel in the serving cell；The running time-frequency resource information that the user equipment is configured in the serving cell；The reference signal sequence that the user equipment is used in the serving cell sending and receiving data；The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；For calculating the user equipment in the parameter of the serving cell link configuration.
- Device described in any one of 1 to 14 according to claim 1, which is characterized in that described device further include: measuring unit and receiving unit；Before the determination unit determines whether user equipment being switched to Target cell from the serving cell currently connected:The measuring unit obtains signal quality information of the user equipment under the serving cell for measuring signal quality of the user equipment under the serving cell；The receiving unit, for receiving signal quality information of the user equipment of second network equipment transmission under at least one cell in addition to the serving cell.
- A kind of cell switching device, which is characterized in that described device is deployed in second network equipment, comprising:Receiving unit, for receiving the cell switch indicating information of first network equipment transmission, the cell switch indicating information is used to indicate second network equipment and user equipment is switched to Target cell from the serving cell currently connected；Link configuration unit, for being configured according to the link configuration information between the user equipment and the serving cell to the communication link between the user equipment and the Target cell.
- Device according to claim 16, which is characterized in that the receiving unit is also used to receive the link configuration information between the user equipment and the serving cell that the first network equipment is sent.
- Device according to claim 17, which is characterized in that the link configuration information carries in the cell switch indicating information.
- Device described in 7 or 18 according to claim 1, which is characterized in that the link configuration information includes one or more of:The user equipment receives the search space information of common signal channel in the serving cell；The running time-frequency resource information that the user equipment is configured in the serving cell；The reference signal sequence that the user equipment is used in the serving cell sending and receiving data；The scrambler sequence that the user equipment is used in the serving cell sending and receiving data；For calculating the user equipment in the parameter of the serving cell link configuration.
- Device described in any one of 6 to 19 according to claim 1, which is characterized in that described device further includes measuring unit and transmission unit；Before the cell switch indicating information that the receiving unit receives that first network equipment is sent:The measuring unit obtains signal quality information of the user equipment under the Target cell for measuring signal quality of the user equipment under the Target cell；The transmission unit, for signal quality information of the user equipment under the Target cell to be sent to the first network equipment.
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| PCT/CN2016/112857 WO2018119816A1 (en) | 2016-12-29 | 2016-12-29 | Cell switching method and device |
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| CN109155953B (en) | 2021-01-05 |
| WO2018119816A1 (en) | 2018-07-05 |
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